Precious stone



FIG. 1 is an illustrative top plan view of a precious stone showing our new design, a bottom plan view also shown looking through the transparent precious stone;

FIG. 2 is an illustrative bottom plan view, a top view also shown looking through the transparent precious stone;

FIGS. 3 and 4 are a front and rear elevational view thereof;

FIG. 5 is a side elevational view thereof; and,

FIG. 6 is a bottom perspective view thereof, also showing a top perspective view looking through the transparent precious stone. 

The ornamental design for a precious stone, as shown and described. 